Port 21 is used by FTP (File Transfer Protocol) for file transfers. Port 53 is for DNS, port 68 is for DHCP, and port 389 is for LDAP. Understanding standard network ports is essential in CompTIA A+ Core 1 objectives, especially in networking and troubleshooting scenarios.

An IDE hard drive uses a Molex connector for power. This 4-pin connector is a standard for older drives.
* Why Not A (F type): F type connectors are used for coaxial cables in video and internet applications.
* Why Not B (SC): SC connectors are for fiber optic cables.
* Why Not D (Lightning): Lightning connectors are for Apple devices.
CompTIA A+ Exam Reference: Core 1 (220-1101), Section 3.1, cable types and connectors.

In response to a security breach involving compromised credentials, one-time tokens provide an effective method to enhance authentication security. These tokens are part of multi-factor authentication (MFA) and generate unique codes for each login attempt, ensuring that even if credentials are stolen, unauthorized access is prevented.
* Why One-time Tokens?
* One-time tokens are dynamic and expire after a single use, significantly reducing the risk of unauthorized access even if usernames and passwords are compromised.
* Often delivered through apps like Google Authenticator, hardware tokens, or SMS.
* Incorrect Options:
* A. Biometric authentication: While secure, it may not address all scenarios and requires additional hardware.
* B. Peer-reviewed log-ins: Not a valid security measure.
* C. Log-in scripts: Used for automating login configurations but do not enhance security directly.
CompTIA A+ Exam Objectives References:
* 220-1102 (Core 2), Section 2.1 and 2.2: Discuss security measures, including multi-factor authentication and one-time token implementations.

The technician should ensure that a VGA cable is connected properly between the monitor and the computer.
A VGA cable is a type of video cable that carries analog signals. If the cable is loose, damaged, or not plugged in correctly, it can cause the monitor to not display any image or show distorted colors. According to the CompTIA Core1 objectives, one of the common display issues is no image on screen. A troubleshooting guide for monitors also recommends checking the VGA cable connection as a possible solution for no signal or blank screen problems.

If a user reports that a PC occasionally fails to boot and makes a strange, repetitive, ticking noise, it indicates that the hard drive is suffering from a mechanical failure, also known as the click of death. This means that the hard drive is likely to fail completely soon and lose all the data stored on it. Therefore, the technician should try to extract or backup the data as soon as possible before replacing the hard drive with a new one.